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The solar steam generation system studied in this project is mainly composed of a double-layered structure. The upper layer is a nano-fluid material with a light absorber, and the lower layer is an insulating material with two-dimensional or three-dimensional water transport channels. It is hydrophilic to utilize capillary forces and promote Fluid flows to the hot zone, and interconnected pores are used for fluid inflow and outflow to the structure. The device embeds a semiconductor temperature difference power generation sheet in the lower layer, the upper surface is in contact with the photothermal layer, and the lower surface is in contact with the bulk water. The formation of a temperature difference generates an electromotive force, which makes the energy utilization efficiency higher.